[enh] Add dockerfile to run duniter4j ES node

Dockerfile

+# Image for Cesium releases on Linux.
+#
+#
+# Building this image:
+#   docker build . --network=host -t duniter/duniter4j-es
+#
+# Test:
+#   docker run --net=host -t duniter/duniter4j-es
+# Test (interactive mode + bash mode):
+#   docker run -i --net=host -t duniter/duniter4j-es bash
+#
+# Pull base image.
+FROM airdock/oracle-jdk:1.8
+
+ARG DUNITER4J_VERSION=1.0.2
+ARG LIBSODIUM_VERSION=1.0.13
+
+# Installing dependencies
+RUN apt-get update && \
+  apt-get --force-yes --yes install wget unzip build-essential
+
+# Installing libsodium
+RUN wget https://download.libsodium.org/libsodium/releases/libsodium-${LIBSODIUM_VERSION}.tar.gz && \
+    tar -xzf libsodium-*.tar.gz && rm *.tar.gz && mv libsodium-* libsodium && \
+    cd libsodium  && \
+    ./configure && \
+    make && make check && \
+    make install
+
+# Create compiling user
+RUN mkdir /duniter4j && \
+	adduser --system --group --quiet --shell /bin/bash --home /duniter4j duniter4j && \
+	chown duniter4j:duniter4j /duniter4j
+WORKDIR /duniter4j
+
+#RUN cd /duniter4j && \
+#	wget https://git.duniter.org/clients/cesium-grp/cesium/repository/v${CESIUM_VERSION}/archive.tar.gz
+#   tar -xzf archive.tar.gz && rm *.tar.gz && mv cesium-* src && \
+
+RUN cd /duniter4j && \
+    wget https://github.com/duniter/duniter4j/releases/download/duniter4j-${DUNITER4J_VERSION}/duniter4j-es-${DUNITER4J_VERSION}-standalone.zip && \
+    unzip *.zip && rm *.zip && mv duniter4j-es-* duniter4j-es && \
+    mkdir duniter4j-es/data && \
+    chown -R duniter4j:duniter4j duniter4j-es
+
+RUN ln -s /duniter4j/duniter4j-es/bin/elasticsearch /usr/bin/duniter4j-es
+
+VOLUME /duniter4j/duniter4j-es
+EXPOSE 9200 9400
+
+USER duniter4j
+WORKDIR /duniter4j
+
+ENTRYPOINT ["/usr/bin/duniter4j-es"]
+CMD []